One of the big plus points of hybrid cars is that they do not need to be recharged at all. Whether it's a plug-in hybrid or a self-charging hybrid, both use the braking system to recharge the internal battery when slowing down. Even if the battery is fully discharged, the petrol engine still provides power so the car can be driven. The PHEV version of the Niro means you have the option to plug the car in and recharge the battery that way - if you do so it is possible to cover more miles without using petrol at all, but if you chose to do so you can rely solely on petrol and let the car provide electric assistance when it is available.